我在使用CKAN时遇到了真正的问题。每次我尝试访问在 Ubuntu 上运行的 CKAN 2.7 实例中的数据集时，我都会收到一个内部服务器错误，该错误开始
错误 - ：预期的字符串或缓冲区
如果我尝试添加数据集，我也会收到同样的错误。任何帮助将不胜感激，因为我没有想法。
我收到的完整日志消息是：
Error - <type 'exceptions.TypeError'>: expected string or buffer
URL: http://155.245.98.207/
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/weberror/errormiddleware.py', line 171 in __call__
app_iter = self.application(environ, sr_checker)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/dec.py', line 147 in __call__
resp = self.call_func(req, *args, **self.kwargs)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/dec.py', line 208 in call_func
return self.func(req, *args, **kwargs)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/fanstatic/publisher.py', line 234 in __call__
return request.get_response(self.app)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/request.py', line 1053 in get_response
application, catch_exc_info=False)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/request.py', line 1022 in call_application
app_iter = application(self.environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/dec.py', line 147 in __call__
resp = self.call_func(req, *args, **self.kwargs)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/dec.py', line 208 in call_func
return self.func(req, *args, **kwargs)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/fanstatic/injector.py', line 54 in __call__
response = request.get_response(self.app)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/request.py', line 1053 in get_response
application, catch_exc_info=False)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/webob/request.py', line 1022 in call_application
app_iter = application(self.environ, start_response)
File '/usr/lib/ckan/default/src/ckan/ckan/config/middleware/pylons_app.py', line 205 in inner
result = application(environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/beaker/middleware.py', line 73 in __call__
return self.app(environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/beaker/middleware.py', line 155 in __call__
return self.wrap_app(environ, session_start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/routes/middleware.py', line 131 in __call__
response = self.app(environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/wsgiapp.py', line 125 in __call__
response = self.dispatch(controller, environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/wsgiapp.py', line 324 in dispatch
return controller(environ, start_response)
File '/usr/lib/ckan/default/src/ckan/ckan/lib/base.py', line 297 in __call__
res = WSGIController.__call__(self, environ, start_response)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/controllers/core.py', line 221 in __call__
response = self._dispatch_call()
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/controllers/core.py', line 172 in _dispatch_call
response = self._inspect_call(func)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/controllers/core.py', line 107 in _inspect_call
result = self._perform_call(func, args)
File '/usr/lib/ckan/default/local/lib/python2.7/site-packages/pylons/controllers/core.py', line 60 in _perform_call
return func(**args)
File '/usr/lib/ckan/default/src/ckan/ckan/controllers/home.py', line 56 in index
context, data_dict)
File '/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py', line 431 in wrapped
result = _action(context, data_dict, **kw)
File '/usr/lib/ckan/default/src/ckan/ckan/logic/action/get.py', line 1865 in package_search
package_dict = json.loads(package_dict)
File '/usr/lib/python2.7/json/__init__.py', line 338 in loads
return _default_decoder.decode(s)
File '/usr/lib/python2.7/json/decoder.py', line 366 in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
TypeError: expected string or buffer
CGI Variables
-------------
CKAN_CURRENT_URL: '/'
CKAN_LANG: 'en'
CKAN_LANG_IS_DEFAULT: True
CONTENT_LENGTH: '0'
HTTP_ACCEPT: '*/*'
HTTP_HOST: '155.245.98.207'
HTTP_LANGUAGE: 'en'
HTTP_USER_AGENT: 'pk'
PATH_INFO: '/'
REMOTE_ADDR: '185.35.63.152'
REQUEST_METHOD: 'GET'
SERVER_NAME: '0.0.0.0'
SERVER_PORT: '80'
SERVER_PROTOCOL: 'HTTP/1.1'
WSGI Variables
--------------
application: <fanstatic.publisher.Delegator object at 0x7faadcfea150>
beaker.cache: <beaker.cache.CacheManager object at 0x7faadcfea050>
beaker.get_session: <bound method SessionMiddleware._get_session of <beaker.middleware.SessionMiddleware object at 0x7faadcf00d10>>
beaker.session: {'_accessed_time': 1497372408.247228, '_creation_time': 1497372408.247228}
ckan.app: 'pylons_app'
fanstatic.needed: <fanstatic.core.NeededResources object at 0x7faab491aad0>
paste.cookies: (<SimpleCookie: >, '')
paste.httpserver.thread_pool: <paste.httpserver.ThreadPool object at 0x7faae64ab950>
paste.registry: <paste.registry.Registry object at 0x7faab413b050>
paste.throw_errors: True
pylons.action_method: <bound method HomeController.index of <ckan.controllers.home.HomeController object at 0x7faaaff0ecd0>>
pylons.controller: <ckan.controllers.home.HomeController object at 0x7faaaff0ecd0>
pylons.environ_config: {'session': 'beaker.session', 'cache': 'beaker.cache'}
pylons.pylons: <pylons.util.PylonsContext object at 0x7faaaff0ef90>
pylons.routes_dict: {'action': u'index', 'controller': u'home'}
repoze.who.api: <repoze.who.api.API object at 0x7faab445a350>
repoze.who.logger: <logging.Logger object at 0x7faadd054dd0>
repoze.who.plugins: {'ckan.lib.authenticator:UsernamePasswordAuthenticator': <ckan.lib.authenticator.UsernamePasswordAuthenticator object at 0x7faadcf00b50>, 'friendlyform': <FriendlyFormPlugin 140371906939664>, 'auth_tkt': <CkanAuthTktCookiePlugin 140371905678864>}
routes.route: <routes.route.Route object at 0x7faadcf97110>
routes.url: <routes.util.URLGenerator object at 0x7faab491a4d0>
webob._parsed_query_vars: (GET([]), '')
webob.adhoc_attrs: {'response': <Response at 0x7faab491aa90 200 OK>, 'language': 'en-us'}
wsgi process: 'Multithreaded'
wsgiorg.routing_args: (<routes.util.URLGenerator object at 0x7faab491a4d0>, {'action': u'index', 'controller': u'home'})
------------------------------------------------------------
2017-06-13 17:46:48,266 INFO [ckan.lib.base] / render time 0.016 seconds
架构 xml 文件是 ：
<?xml version="1.0" encoding="UTF-8" ?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!--
NB Please copy changes to this file into the multilingual schema:
ckanext/multilingual/solr/schema.xml
-->
<!-- We update the version when there is a backward-incompatible change to this
schema. In this case the version should be set to the next CKAN version number.
(x.y but not x.y.z since it needs to be a float) -->
<schema name="ckan" version="2.3">
<types>
<fieldType name="string" class="solr.StrField" sortMissingLast="true" omitNorms="true"/>
<fieldType name="boolean" class="solr.BoolField" sortMissingLast="true" omitNorms="true"/>
<fieldtype name="binary" class="solr.BinaryField"/>
<fieldType name="int" class="solr.TrieIntField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="float" class="solr.TrieFloatField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="long" class="solr.TrieLongField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="double" class="solr.TrieDoubleField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="tint" class="solr.TrieIntField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="tfloat" class="solr.TrieFloatField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="tlong" class="solr.TrieLongField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="tdouble" class="solr.TrieDoubleField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
<fieldType name="date" class="solr.TrieDateField" omitNorms="true" precisionStep="0" positionIncrementGap="0"/>
<fieldType name="tdate" class="solr.TrieDateField" omitNorms="true" precisionStep="6" positionIncrementGap="0"/>
<fieldType name="tdates" class="solr.TrieDateField" precisionStep="7" positionIncrementGap="0" multiValued="true"/>
<fieldType name="booleans" class="solr.BoolField" sortMissingLast="true" multiValued="true"/>
<fieldType name="tints" class="solr.TrieIntField" precisionStep="8" positionIncrementGap="0" multiValued="true"/>
<fieldType name="tfloats" class="solr.TrieFloatField" precisionStep="8" positionIncrementGap="0" multiValued="true"/>
<fieldType name="tlongs" class="solr.TrieLongField" precisionStep="8" positionIncrementGap="0" multiValued="true"/>
<fieldType name="tdoubles" class="solr.TrieDoubleField" precisionStep="8" positionIncrementGap="0" multiValued="true"/>
<fieldType name="text" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="1"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.SnowballPorterFilterFactory" language="English" protected="protwords.txt"/>
<filter class="solr.ASCIIFoldingFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0" splitOnCaseChange="1"/>
<filter class="solr.LowerCaseFilterFactory"/>
<filter class="solr.SnowballPorterFilterFactory" language="English" protected="protwords.txt"/>
<filter class="solr.ASCIIFoldingFilterFactory"/>
</analyzer>
</fieldType>
<!-- A general unstemmed text field - good if one does not know the language of the field -->
<fieldType name="textgen" class="solr.TextField" positionIncrementGap="100">
<analyzer type="index">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="1" catenateNumbers="1" catenateAll="0" splitOnCaseChange="0"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
<analyzer type="query">
<tokenizer class="solr.WhitespaceTokenizerFactory"/>
<filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" ignoreCase="true" expand="true"/>
<filter class="solr.WordDelimiterFilterFactory" generateWordParts="1" generateNumberParts="1" catenateWords="0" catenateNumbers="0" catenateAll="0" splitOnCaseChange="0"/>
<filter class="solr.LowerCaseFilterFactory"/>
</analyzer>
</fieldType>
</types>
<fields>
<field name="index_id" type="string" indexed="true" stored="true" required="true" />
<field name="id" type="string" indexed="true" stored="true" required="true" />
<field name="site_id" type="string" indexed="true" stored="true" required="true" />
<field name="title" type="text" indexed="true" stored="true" />
<field name="entity_type" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="dataset_type" type="string" indexed="true" stored="true" />
<field name="state" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="name" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="revision_id" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="version" type="string" indexed="true" stored="true" />
<field name="url" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="ckan_url" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="download_url" type="string" indexed="true" stored="true" omitNorms="true" />
<field name="notes" type="text" indexed="true" stored="true"/>
<field name="author" type="textgen" indexed="true" stored="true" />
<field name="author_email" type="textgen" indexed="true" stored="true" />
<field name="maintainer" type="textgen" indexed="true" stored="true" />
<field name="maintainer_email" type="textgen" indexed="true" stored="true" />
<field name="license" type="string" indexed="true" stored="true" />
<field name="license_id" type="string" indexed="true" stored="true" />
<field name="ratings_count" type="int" indexed="true" stored="false" />
<field name="ratings_average" type="float" indexed="true" stored="false" />
<field name="tags" type="string" indexed="true" stored="true" multiValued="true"/>
<field name="groups" type="string" indexed="true" stored="true" multiValued="true"/>
<field name="organization" type="string" indexed="true" stored="true" multiValued="false"/>
<field name="capacity" type="string" indexed="true" stored="true" multiValued="false"/>
<field name="res_name" type="textgen" indexed="true" stored="true" multiValued="true" />
<field name="res_description" type="textgen" indexed="true" stored="true" multiValued="true"/>
<field name="res_format" type="string" indexed="true" stored="true" multiValued="true"/>
<field name="res_url" type="string" indexed="true" stored="true" multiValued="true"/>
<field name="res_type" type="string" indexed="true" stored="true" multiValued="true"/>
<!-- catchall field, containing all other searchable text fields (implemented
via copyField further on in this schema -->
<field name="text" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="urls" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="depends_on" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="dependency_of" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="derives_from" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="has_derivation" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="links_to" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="linked_from" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="child_of" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="parent_of" type="text" indexed="true" stored="false" multiValued="true"/>
<field name="views_total" type="int" indexed="true" stored="false"/>
<field name="views_recent" type="int" indexed="true" stored="false"/>
<field name="resources_accessed_total" type="int" indexed="true" stored="false"/>
<field name="resources_accessed_recent" type="int" indexed="true" stored="false"/>
<field name="metadata_created" type="date" indexed="true" stored="true" multiValued="false"/>
<field name="metadata_modified" type="date" indexed="true" stored="true" multiValued="false"/>
<field name="indexed_ts" type="date" indexed="true" stored="true" default="NOW" multiValued="false"/>
<!-- Copy the title field into titleString, and treat as a string
(rather than text type). This allows us to sort on the titleString -->
<field name="title_string" type="string" indexed="true" stored="false" />
<field name="data_dict" type="string" indexed="false" stored="true" />
<field name="validated_data_dict" type="string" indexed="false" stored="true" />
<field name="_version_" type="string" indexed="true" stored="true"/>
<dynamicField name="*_date" type="date" indexed="true" stored="true" multiValued="false"/>
<dynamicField name="extras_*" type="text" indexed="true" stored="true" multiValued="false"/>
<dynamicField name="res_extras_*" type="text" indexed="true" stored="true" multiValued="true"/>
<dynamicField name="vocab_*" type="string" indexed="true" stored="true" multiValued="true"/>
<dynamicField name="*" type="string" indexed="true" stored="false"/>
</fields>
<uniqueKey>index_id</uniqueKey>
<defaultSearchField>text</defaultSearchField>
<solrQueryParser defaultOperator="AND"/>
<copyField source="url" dest="urls"/>
<copyField source="ckan_url" dest="urls"/>
<copyField source="download_url" dest="urls"/>
<copyField source="res_url" dest="urls"/>
<copyField source="extras_*" dest="text"/>
<copyField source="res_extras_*" dest="text"/>
<copyField source="vocab_*" dest="text"/>
<copyField source="urls" dest="text"/>
<copyField source="name" dest="text"/>
<copyField source="title" dest="text"/>
<copyField source="text" dest="text"/>
<copyField source="license" dest="text"/>
<copyField source="notes" dest="text"/>
<copyField source="tags" dest="text"/>
<copyField source="groups" dest="text"/>
<copyField source="organization" dest="text"/>
<copyField source="res_name" dest="text"/>
<copyField source="res_description" dest="text"/>
<copyField source="maintainer" dest="text"/>
<copyField source="author" dest="text"/>
<copyField source="capacity" dest="text"/>
<copyField source="metadata_modified" dest="date"/>
</schema>
它说 SOLR 返回的package_dict不是 JSON，它需要是。
- 您是否使用推荐的 SOLR 版本？
- 您是否尝试过为所有数据集重新编制索引？
paster --plugin=ckan search-index rebuild --config=/etc/ckan/std/std.ini
如果这不起作用，那么我建议您深入研究/usr/lib/ckan/default/src/ckan/ckan/logic/action/get.py中发生错误时发生了什么。看看package_dict和data_source的价值是什么，使用 pdb 或打印语句，使用 paster 运行 ckan 。